They say that all our life is destined, right ?
"They" say a lot of things, a lot of it is just bollocks.
When you boil it down, "destiny" is just defeatism, you don't want to take responsibility for your actions so you claim they were predetermined. Alternatively, it can just be a coping mechanism to accept things that have happened. The only place the concept of destiny has any value in would be in books, in stories.
In reality, life is partially what you make of it and partially circumstance.
Destiny according to religious is the pre-plan for our life by our creator and by religious standard we hardly determine what happened to us but as our creator has plan it before we were born. To science and psychology it a different things and psychologically what happened to us is our making. It is better to look at the two point of views in other for us to understand what is Destiny and what is not.